ios - How do i save an image that was selected by a user with swift? -

in app making, user select photo, appear in imageview. how save image selected in image.xcassets folder, when relaunch app, image still there?

here code using...

import uikit  class viewcontroller: uiviewcontroller, uiimagepickercontrollerdelegate, uinavigationcontrollerdelegate {      @iboutlet weak var imageview: uiimageview!     override func viewdidload() {         super.viewdidload()         // additional setup after loading view, typically nib.     }      override func didreceivememorywarning() {         super.didreceivememorywarning()         // dispose of resources can recreated.     }      @ibaction func action(sender: anyobject) {          if uiimagepickercontroller.issourcetypeavailable(uiimagepickercontrollersourcetype.camera) {              let imagepicker:uiimagepickercontroller = uiimagepickercontroller()             imagepicker.delegate = self             imagepicker.sourcetype = uiimagepickercontrollersourcetype.camera             imagepicker.allowsediting = false              self.presentviewcontroller(imagepicker, animated: true, completion: nil)             }      }           func imagepickercontroller(picker: uiimagepickercontroller, didfinishpickingmediawithinfo info: [nsobject : anyobject]) {                self.dismissviewcontrolleranimated(true, completion: nil)              self.imageview.image = info[uiimagepickercontrolleroriginalimage] as? uiimage  //how save image in folder?         }          } 

you can doing this

var finalimage : uiimage()  //your method func saveimage () {         self.imageview.image = info[uiimagepickercontrolleroriginalimage] as? uiimage        self.finalimage = self.imageview.image uiimage         let nsdocumentdirectory = nssearchpathdirectory.documentdirectory        let nsuserdomainmask = nssearchpathdomainmask.userdomainmask        if let paths = nssearchpathfordirectoriesindomains(nsdocumentdirectory, nsuserdomainmask, true) {         if paths.count > 0 {          if let dirpath = paths[0] as? string {          let readpath = dirpath.stringbyappendingpathcomponent("image.png")          let image = uiimage(named: readpath)          let writepath = dirpath.stringbyappendingpathcomponent("image2.png")           uiimagepngrepresentation(self.finalimage).writetofile(writepath, atomically: true)     }    }  }   }